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author | Rusty Russell <rusty@rustcorp.com.au> | 2008-02-04 23:50:03 -0500 |
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committer | Rusty Russell <rusty@rustcorp.com.au> | 2008-02-04 23:50:03 +1100 |
commit | 6e5aa7efb27aec7e55b6463fa2c8db594c4226fa (patch) | |
tree | 060a955e711ac224136157a5410e88dcdab965af /COPYING | |
parent | b3369c1fb410fddeb38a404316c861395f6d6ae8 (diff) |
virtio: reset function
A reset function solves three problems:
1) It allows us to renegotiate features, eg. if we want to upgrade a
guest driver without rebooting the guest.
2) It gives us a clean way of shutting down virtqueues: after a reset,
we know that the buffers won't be used by the host, and
3) It helps the guest recover from messed-up drivers.
So we remove the ->shutdown hook, and the only way we now remove
feature bits is via reset.
We leave it to the driver to do the reset before it deletes queues:
the balloon driver, for example, needs to chat to the host in its
remove function.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'COPYING')
0 files changed, 0 insertions, 0 deletions